使用Powermockito聲明靜態方法的參數值

Question

我的簡化的類文件如下所示：

public class NotificationHelper{

public static void sendNotification(String id){
    switch (id) {
        case mobile:
            String message = "Created new account"
            break;
        case email:
            String message = "Hi, An account is created with our website using your email id. This is a notification regarding the same."
            break;
        default:
            throw new Exception("id is neither phone number nor email id");
    }
    notify(id, message);
}

public static void notify(String id, String message){
    //Code to send notification
}
}

我正在編寫一個junit測試類，以在sendNotification notify方法的同時測試sendNotification方法。 目的是斷言傳遞給notify方法的id和消息變量的值。

Answer 1

您需要創建一個間諜 。 使用嘲笑API：

@RunWith(PowerMockRunner.class)
@PrepareForTest(NotificationHelper.class)
@PowerMockRunnerDelegate(PowerMockRunnerDelegate.DefaultJUnitRunner.class) // for @Rule
public class NotificationHelperTest {
    @Rule
    public ExpectedException expectedException = ExpectedException.none();

    @Before
    public void setUp() throws Exception {
        PowerMockito.spy(NotificationHelper.class);
    }

    @Test
    public void testSendNotificationForEmail() throws Exception {
        NotificationHelper.sendNotification("email");

        PowerMockito.verifyStatic();
        NotificationHelper.notify("email", "Hi, An account is created with our website using your email id. This is a notification regarding the same.");
    }

    @Test
    public void testSendNotificationForMobile() throws Exception {
        NotificationHelper.sendNotification("mobile");

        PowerMockito.verifyStatic();
        NotificationHelper.notify("mobile", "Created new account");
    }

    @Test
    public void testSendNotification() throws Exception {
        this.expectedException.expect(Exception.class);
        this.expectedException.expectMessage("id is neither phone number nor email id");
        NotificationHelper.sendNotification("foobar");
    }
}

請注意，我確實更正了您的NotificationHelper ：

public class NotificationHelper {
    public static void sendNotification(String id) throws Exception {
        // TODO: use an enum
        String message;
        switch (id) {
            case "mobile":
                message = "Created new account";
                break;
            case "email":
                message = "Hi, An account is created with our website using your email id. This is a notification regarding the same.";
                break;
            default:
                throw new Exception("id is neither phone number nor email id");
        }
        notify(id, message);
    }

    public static void notify(String id, String message){
        //Code to send notification
    }
}

使用 PowerMock 1.6.2 測試

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另請注意，如果避免使用static ，則測試總是容易得多 。